Wouldn't a Platinum model be an '88? ie. 20 years.
Never the less, that really looks sharp. Love the updated gauges and interior.
Check the last two digits of the Hull Identification Number for the year.
You can find folks that will pay a premium for 20, 25, etc. year models.
I think you also confirmed to me that I should remove the yellowing MasterCraft stickers from the chrome valve covers.
1988 Tristar 190 Sport, 351W w/GT-40's, 1:1 Velvetdrive